A post office has a single line for customers waiting for the next available pos

Question

A post office has a single line for customers waiting for the next available postal clerk. There are two postal clerks who work at the same rate. The arrival rate of customers follows a Poisson distribution, while the service time follows an exponential distribution. The average arrival rate is three per minute and the average service rate is two per minute for each of the two clerks. How long does the average person spend waiting for a clerk? a. 1.143 minutes b. 0.643 minute c. 1.929 minutes d. 3.429 minutes e. None of the above

Explanation / Answer

d. 3.429 minutes

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